“Before [white settlers killed so many] every mile you would have found a beaver…They’re a keystone species for keeping healthy river systems intact.”
'They also created wetlands that allow water to seep into the ground, raising the water table and creating habitat that is valuable as conditions get drier and warmer.’
“[Water entering the soil] creates things like fire breaks, as well as much cooler temperatures for the water…]”
https://www.opb.org/article/2026/04/15/corvallis-beavers-nonprofit-dams/

Co-existing with beavers: Corvallis, nonprofits try new tactic in bypassing dams
A beaver dam on Mulkey Creek led to flooding and closures of a popular trail. Groups looking for a solution settled on a simple fix: putting a notch in the dam, then surrounding it with a cage big enough for passing fish but not for beavers to get in and repair it.




